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| 1 |
Calyx exterior glabrous (rarely with a few scattered hairs), often caducous after anthesis |
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(2) |
| + |
Calyx tube exterior hairy, often persistent and enclosing fruit |
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(20) |
| |
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| 2 (1) |
Flowers 5-merous |
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(3) |
| + |
Flowers 4-merous |
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(11) |
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| 3 (2) |
Leaves always alternate, sometimes very close spaced and apparently whorled, blade 1-1.5 mm wide. |
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43 W. linearifolia |
| + |
Leaves at least partly opposite, blade at least 3 mm wide |
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(4) |
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| 4 (3) |
Inflorescences clustered into a head; lateral veins 3-7 per side of midrib |
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(5) |
| + |
Inflorescence a raceme or panicle, or spike; lateral veins 6-12 per side of midrib or obscure |
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(6) |
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| 5 (4) |
Older branches pale reddish or brownish gray; leaf blade with lateral veins 3 or 4 per side of midrib; disk apex entire or slightly retuse. |
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41 W. fargesii |
| + |
Older branches dark purple-brown; leaf blade with lateral veins 5-7 per side of midrib; disk apex irregularly deeply or shallowly lobed. |
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42 W. fuminensis |
| |
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| 6 (4) |
Inflorescence a solitary raceme |
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(7) |
| + |
Inflorescence a panicle, lax or dense |
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(9) |
| |
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| 7 (6) |
Peduncle 2-4 cm; racemes terminal and axillary. |
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44 W. scytophylla |
| + |
Peduncle 0.7-1.1 cm; racemes terminal, 3-7-flowered |
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(8) |
| |
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| 8 (7) |
Leaf blade 1-2 cm wide, leathery or thinly so; calyx yellow. |
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45 W. huidongensis |
| + |
Leaf blade 0.3-0.8 cm wide, membranous; calyx white. |
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46 W. anhuiensis |
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| 9 (6) |
Panicle dense, spicate; leaves closely spaced, blade leathery, lateral veins white and prominent; calyx yellow. |
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47 W. lamatsoensis |
| + |
Panicle lax; leaves not closely spaced; leaf blade papery, lateral veins not white and prominent; calyx white or yellowish green |
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(10) |
| |
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| 10 (9) |
Leaf blade 1-2.2(-3.5) cm wide; calyx tube 6-8 mm. |
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48 W. trichotoma |
| + |
Leaf blade 0.3-0.6 cm wide; calyx tube 12-13 mm. |
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49 W. leptophylla |
| |
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| 11 (2) |
Leaves alternate, rarely subopposite |
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(12) |
| + |
Leaves mostly truly opposite |
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(15) |
| |
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| 12 (11) |
Inflorescence a much branched panicle. |
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6 W. longipaniculata |
| + |
Inflorescence a compact head or raceme |
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(13) |
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| 13 (12) |
Calyx white or pink to purplish red; inflorescence bracteate. |
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10 W. glabra |
| + |
Calyx yellow, yellow-green or green; inflorescence ebracteate |
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(14) |
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| 14 (13) |
Biennial or perennial herb or subshrub; leaf blade 1.2-2.5 × 0.3-0.8 cm. |
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7 W. linoides |
| + |
Shrub, sometimes dwarf; leaf blade 3-8 × 0.7-2.8(-4) cm. |
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11 W. nutans |
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| 15 (11) |
Young stems pubescent or puberulous |
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(16) |
| + |
Young stems glabrous |
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(18) |
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| 16 (15) |
Calyx tube 4-7 mm. |
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3 W. chui |
| + |
Calyx tube 12-15 mm |
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(17) |
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| 17 (16) |
Leaf blade elliptic, ovate, or ovate-lanceolate, 4-10 × 2-3.3 cm. |
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4 W. hainanensis |
| + |
Leaf blade oblong-obovate to lanceolate, 1.5-3 × 0.3-0.8 cm. |
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12 W. salicina |
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| 18 (15) |
Leaf blade 0.8-2.5 × 0.2-1.2 cm, ± leathery. |
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8 W. angustifolia |
| + |
Leaf blade 3-20 × 1.5-9 cm, membranous to papery |
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(19) |
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| 19 (18) |
Leaf blade 13-20 × 4.5-9 cm; peduncle 2-6 cm; calyx lobes 5-6 mm. |
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2 W. liangii |
| + |
Leaf blade 3-6(-8.5) × 1.5-2.5(-4) cm; peduncle 0.7-2 cm, slender, pendulous; calyx lobes ca. 3 mm. |
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11 W. nutans |
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| 20 (1) |
Flowers 5-merous |
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(21) |
| + |
Flowers 4-merous |
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(23) |
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| 21 (20) |
Inflorescences always axillary. |
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38 W. paxiana |
| + |
Inflorescences mostly terminal, often on lateral branches, sometimes also axillary |
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(22) |
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| 22 (21) |
Stems yellow, leaves sometimes opposite; flowers shortly pedicellate. |
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40 W. pilosa |
| + |
Stems purple-red; leaves always alternate; flowers sessile. |
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39 W. dolichantha |
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| 23 (20) |
Flowers in terminal and short, subapical, lateral fascicles forming a leafy thyrse; hypogynal disk scale very broad, almost annular, deeply 7-10-lobed. |
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37 W. subcyclolepidota |
| + |
Flowers in terminal and subterminal spikes or racemes, sometimes grouped into panicles, or axillary; hypogynal disk annular or cupular or scales 1-4, linear or oblong, apically lobed or toothed |
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(24) |
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| 24 (23) |
Herbaceous perennial. |
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7 W. linoides |
| + |
Shrub, sometimes dwarf |
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(25) |
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| 25 (24) |
Leaves mostly alternate, rarely also subopposite, very rarely a few opposite |
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(26) |
| + |
Leaves mostly opposite or subopposite, sometimes also alternate |
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(37) |
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| 26 (25) |
Inflorescence a panicle of terminal and subterminal spikes or heads; lateral leaf veins often obscure |
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(27) |
| + |
Inflorescence a head elongating into a short raceme during anthesis, or a 1-4-flowered fascicle terminal on lateral branches; lateral leaf veins distinct |
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(29) |
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| 27 (26) |
Calyx 3.5-4 mm; leaf blade linear to narrowly oblong, 2-5 mm wide, adaxially glabrous. |
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32 W. cochlearifolia |
| + |
Calyx 8-9 mm; leaf blade elliptic or obovate-elliptic or narrowly elliptic, 3-8(-15) mm wide, adaxially hairy |
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(28) |
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| 28 (27) |
Leaf blade adaxially tomentose; ovary densely appressed hirsute; disk scales 2, unequal, apex 2- or 3-toothed. |
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31 W. pampaninii |
| + |
Leaf blade adaxially sericeous; ovary glabrous except for pilose apex; disk scale 1, apex obtuse to truncate, finely dentate or irregularly crenulate. |
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20 W. haoi |
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| 29 (26) |
Inflorescence a 1-4-flowered fascicle |
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(30) |
| + |
Inflorescences elongating during anthesis, mostly more than 4-flowered; ovary completely pubescent; bud globose, densely white pubescent; flowers yellow |
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(34) |
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| 30 (29) |
Both surfaces of leaf blade glabrous, membranous |
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(31) |
| + |
Both surfaces of leaf blade pubescent |
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(32) |
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| 31 (30) |
Leaf blade broadly elliptic to obovate, 2-5 × 1-2.5 cm; calyx pale green. |
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26 W. techinensis |
| + |
Leaf blade oblong to elliptic, 0.8-1.8 × 0.4-1.1 cm; calyx yellow. |
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27 W. baimashanensis |
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| 32 (30) |
Leaf blade 1-2.5 mm wide. |
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28 W. sinoparviflora |
| + |
Leaf blade 4-12 mm wide |
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(33) |
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| 33 (32) |
Leaf blade 3-3.8 × 0.9-1.2 cm. |
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29 W. alternifolia |
| + |
Leaf blade 0.7-1.2 × 0.4-0.7 cm. |
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30 W. lungtzeensis |
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| 34 (29) |
Ovary sessile; leaf blade appressed sericeous. |
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33 W. capitatoracemosa |
| + |
Ovary stipitate; leaf blade pubescent at least on midrib, sometimes glabrescent |
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(35) |
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| 35 (34) |
Leaf blade glabrescent, reticulate veins abaxially obscure. |
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34 W. ligustrina |
| + |
Leaf blade persistently pubescent, at least on midrib, reticulate veins abaxially conspicuous |
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(36) |
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| 36 (35) |
Calyx ca. 15 mm, exterior with appressed and long sericeous pubescence; leaf blade 2-5 × 0.8-1.6 cm, lateral veins 5 or 6 pairs, abaxially conspicuous. |
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35 W. canescens |
| + |
Calyx ca. 12 mm, exterior with appressed and short pubescence; leaf blade 1.5-3 × 0.5-1 cm, lateral veins 3 or 4 pairs, slender, abaxially obscure |
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36 W. lichiangensis |
| |
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| 37 (25) |
Leaf blade 1.5-2.5 mm wide, to 2.5 cm. |
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23 W. stenophylla |
| + |
Leaf blade (2-)3-35 mm wide, if less than 3 mm, then at least 2.5 cm |
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(38) |
| |
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| 38 (37) |
Calyx pink, purple, lilac, or lavender |
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(39) |
| + |
Calyx yellow, greenish yellow, yellowish white, or green, sometimes flushed with purple or red |
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(42) |
| |
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| 39 (38) |
Calyx 4-6 mm |
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(40) |
| + |
Calyx 7-12 mm |
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(41) |
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| 40 (39) |
Ovary glabrous except for pilose apex; inflorescence ± paniculate, ca. 20-flowered. |
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20 W. haoi |
| + |
Ovary uniformly hairy; inflorescence not paniculate, 3-5(-8)-flowered. |
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21 W. vaccinium |
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| 41 (39) |
Leaf blade drying dark brown; lateral veins 4 or 5 per side; calyx tube 9-12 mm. |
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17 W. monnula |
| + |
Leaf blade drying green, lateral veins 10 or 11 per side; calyx tube ca. 15 mm. |
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1 W. mononectaria |
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| 42 (38) |
Calyx 4-6 mm |
|
(43) |
| + |
Calyx 7-15 mm |
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(44) |
| |
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| 43 (42) |
Calyx yellowish white or green, sometimes flushed with purple; tube slightly ovoid, 2-5 mm. |
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15 W. taiwanensis |
| + |
Calyx yellow; tube cylindric, 4-6 mm. |
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9 W. micrantha |
| |
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| 44 (42) |
Inflorescence a panicle of racemes |
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(45) |
| + |
Inflorescence capitate or shortly racemose, sometimes indistinctly paniculate |
|
(48) |
| |
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| 45 (44) |
Leaf blade abaxially glabrous; calyx greenish yellow or creamy-yellow, sometimes flushed with purple, tube often less than 10 mm |
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(46) |
| + |
Leaf blade abaxially hairy; calyx yellow, tube ca. 10 mm |
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(47) |
| |
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| 46 (45) |
Leaf blade lanceolate-obovate, obovate, or oblanceolate, 1.6-2.5 cm wide; hypogynal disk annular, extended on one side into 1(-3) obovate scale(s). |
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5 W. delavayi |
| + |
Leaf blade lanceolate to oblong-lanceolate, 0.2-1 cm wide; hypogynal disk scales 2(or 3), linear or oblong, basally connate. |
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22 W. chamaedaphne |
| |
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| 47 (45) |
Leaf blade elliptic or ovate-orbicular to oblong, 0.8-2.8 cm wide; hypogynal disk scales 2, one linear and one oblong. |
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24 W. gracilis |
| + |
Leaf blade narrowly oblanceolate to broadly linear, 0.4-0.8 cm wide; hypogynal disk scale 1, obovate, margin crenate. |
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25 W. reginaldi-farreri |
| |
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|
| 48 (44) |
Lateral veins slender, dense, at a very narrow angle to midrib |
|
(49) |
| + |
Lateral veins remote, obscure, 5-7 pairs, at wide angle to midrib |
|
(50) |
| |
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| 49 (48) |
Leaf blade oblong to lanceolate, 5-15 mm wide, abaxially reddish brown when dried. |
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14 W. indica |
| + |
Leaf blade elliptic or oblong, apex broad, 4-9 mm wide, both surfaces glabrous, abaxially pale green. |
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18 W. capitata |
| |
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|
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| 50 (48) |
Leaf blade lanceolate, 0.8-1.2 cm wide; stems relatively slender. |
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16 W. lanceolata |
| + |
Leaf blade obovate to oblong, 1.3-2.5 cm wide; stems relatively stout |
|
(51) |
| |
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| 51 (50) |
Inflorescence often 15-26-flowered, peduncle to 0.5 cm, stout. |
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13 W. pachyrachis |
| + |
Inflorescence 4-6(-20)-flowered, peduncle 0.7-3 cm, slender. |
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19 W. retusa |
|
